Graco 224966 Inlet Valve

Graco 224966 Inlet Valve is a genuine OEM fluid-section component designed to maintain proper suction and pressure in Graco airless sprayers. It ensures reliable paint intake and smooth operation during each pump cycle.

Replaces worn or leaking inlet seat assemblies
Fits multiple Graco ST-series and Ultra models
Restores priming efficiency and prevents fluid leaks
OEM-quality metal construction for durability

Retail Price: $125

You save: $10.38 (8.30%)

Our Price: $114.62

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Description

Inlet Valve Overview & Compatibility

Compatible Machines

The Graco 224966 Inlet Valve (also known as 224-966 Intake/Inlet Seat) is used on a range of legacy Graco ST-series and related sprayers. Always verify your sprayer’s exact model and series before ordering.

Graco 190 ES (ST-style)
Graco 390 ST / 390 STS
Graco 395 ST / 395 Duron / 395 EuroPro
Graco 450 ST
Graco 455 ST
Graco 490 ST
Graco 495 ST / 495 EuroPro
Graco 600 Ultra / Ultra 600 Plus
Graco 3000 GM (Lo-Boy / Upright)
Graco 3000 LineLazer
ASM 1900 / ASM 1900 Zip-Spray Plus
Fuller-O’Brien 301 STS Pro
Graco 290 Easy

What the 224966 Inlet Valve Does

This valve threads into the bottom of the pump’s fluid section, captures the inlet ball, and provides the female connection for the suction tube. It allows coating to enter the pump on the downstroke and seals on the upstroke to maintain prime and pressure.

Quick Specs

Part Number	224966 (a.k.a. 224-966)
Part Type	Inlet / Intake Valve (Fluid Section)
Common Use	Restore suction/priming, fix check-valve leakage, routine pump service
Notes	Install per machine manual (clean threads, sealant/torque per spec); confirm model & series

When to Replace

Hard priming, frequent loss of prime, or pulsation at the gun
Material leaking past the inlet seat or visibly worn/damaged seat
Regular pump overhaul (replace inlet & outlet checks as a set for best results)

Installation Tips (General)

Disconnect power/pressure, relieve pressure fully, and flush per manual.
Clean inlet bore/threads; follow your model’s specified thread sealant and torque.
Inspect/replace the inlet ball and related seals if worn.
After reassembly, prime with compatible solvent/paint and check for leaks.

Frequently Asked Questions

Check your sprayer’s model + series/serial against the parts manual. Some models (e.g., Duron/EuroPro variants) have series breaks that change valve part numbers. When in doubt, match by parts diagram for your specific serial range.

Slow or failed priming, losing prime during spraying, or material bypass at the inlet seat. If the inlet ball/seat is worn or pitted, the pump won’t hold suction consistently.

It’s smart to inspect/replace the inlet ball, outlet/check valve, and any seals or packings in the fluid section during the same service to restore full performance.

Yes. Bedford part 58-2215 is a well-known replacement that lists compatibility with the same ST-series models. Choose OEM vs aftermarket based on your preference and warranty requirements.

Follow the torque and thread sealant specified in your model’s service manual. Over-tightening can damage the seat or fluid section; under-tightening can cause leakage.